The patch titled
Subject: init/Kconfig: enable -O3 for all arches
has been added to the -mm tree. Its filename is
init-kconfig-enable-o3-for-all-arches.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/init-kconfig-enable-o3-for-all-arches.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/init-kconfig-enable-o3-for-all-arches.patch
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------------------------------------------------------
From: Oleksandr Natalenko <oleksandr@xxxxxxxxxx>
Subject: init/Kconfig: enable -O3 for all arches
Building a kernel with -O3 may help in hunting bugs like [1] and thus
using this switch should not be restricted to one specific arch only.
So let's expose it. If for some reasone we have to hide it, lets hide it
under EXPERT.
The commit is made against next-20191210 tag.
[1] https://lore.kernel.org/lkml/673b885183fb64f1cbb3ed2387524077@xxxxxxxxxxxxxx/
Link: http://lkml.kernel.org/r/20191210145657.105808-1-oleksandr@xxxxxxxxxx
Signed-off-by: Oleksandr Natalenko <oleksandr@xxxxxxxxxx>
Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Jessica Yu <jeyu@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Cc: Joel Fernandes <joel@xxxxxxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Patrick Bellasi <patrick.bellasi@xxxxxxx>
Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: "Eric W . Biederman" <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
init/Kconfig | 1 -
1 file changed, 1 deletion(-)
--- a/init/Kconfig~init-kconfig-enable-o3-for-all-arches
+++ a/init/Kconfig
@@ -1228,7 +1228,6 @@ config CC_OPTIMIZE_FOR_PERFORMANCE
config CC_OPTIMIZE_FOR_PERFORMANCE_O3
bool "Optimize more for performance (-O3)"
- depends on ARC
imply CC_DISABLE_WARN_MAYBE_UNINITIALIZED # avoid false positives
help
Choosing this option will pass "-O3" to your compiler to optimize
_
Patches currently in -mm which might be from oleksandr@xxxxxxxxxx are
init-kconfig-enable-o3-for-all-arches.patch
